HP 3000 Manuals HP 3000 Manuals
DEBUG COMMANDS
DEBUG commands consist of the following elements:
* A question mark prompt, displayed by DEBUG.
* The command name, consisting of a one- or two-letter identifier. The
command name must immediately follow the prompt (i.e., no intervening
blanks).
* Parameters, if any, follow the command name. Blank characters may
appear anywhere after the command name, but are not required. For
some commands, however, the first parameter must be preceded by a
comma. See the SYNTAX and EXAMPLES parts of the command
specifications for details about specifying parameters.
* Parameters that are numeric values (segment, offset, etc.) can be
specified as an expression that, when evaluated, results in a single
precision number Expressions requiring evaluation must be enclosed
within parentheses.
* An expression can include any of the operators: + , - , /, or * .
The operands in an expression are assumed to be octal numbers unless
indicated otherwise as follows:
# prefix to decimal value; e.g., # 10 is decimal value
10
% prefix to octal value; e.g. , 10 or %10 is octal
value 10
"" enclose ASCII characters for which an octal
equivalent is indicated; "A" indicates octal
equivalent 101.
` ' enclose memory location of which the contents are
indicated; e.g., "DB+ 4" is the contents of location
DB+4.
$ prefix indicating contents of a register; e.g., $P
is the current value of P.
!(a:b) extract bit field where a is the starting bit and b
is the number of bits; e.g.,$P!(10:10) is bits 8
through 15 of the contents of register P. a and b
are octal values.
* Parameters used as an offset to a memory location base followed by a
colon (:) to indicate indirect addressing.